diff --git a/backend/app/models/models.py b/backend/app/models/models.py
index 8fb2bc2..199ecb4 100644
--- a/backend/app/models/models.py
+++ b/backend/app/models/models.py
@@ -37,6 +37,7 @@ class CreateUserRequest(BaseModel):
     role_id: int = 2
 
 class UpdateUserRequest(BaseModel):
+    username: Optional[str] = None
     caption: Optional[str] = None
     email: Optional[str] = None
     role_id: Optional[int] = None